6.4 - Data preparation
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Practice Questions
Test your understanding with targeted questions
What is data correction and why is it important?
💡 Hint: Think about why accuracy matters in surveys.
Describe the purpose of sample expansion.
💡 Hint: How do we ensure our smaller data set accurately represents a bigger group?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does data correction help to achieve?
💡 Hint: Think about why we worry about data quality.
True or False: Sample expansion is only performed if the survey sample is too small.
💡 Hint: Consider the purpose of accurately reflecting the overall population.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
If a survey collects data indicating an average household size of 3 but census data reveals 5, what adjustments need to be made?
💡 Hint: Consider how the sample size correlates with actual census data.
Given survey results of 150 completed responses out of a total of 600 households, with 50 no responses, calculate the expansion factor, and explain its significance.
💡 Hint: Use the expansion factor formula correctly to yield your conclusions.
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